Merge pull request #655 from jnxxx/master

Support for water usage insights

ha-addon/mqtt_discovery/multical21.json

@@ -12,6 +12,7 @@
             "enabled_by_default": true,
             "json_attributes_topic": "wmbusmeters/{name}",
             "state_class": "total",
+            "device_class": "water",
             "name": "{name} total",
             "state_topic": "wmbusmeters/{name}",
             "unique_id": "wmbusmeters_{id}_{attribute}",
@@ -33,6 +34,7 @@
             },
             "enabled_by_default": true,
             "state_class": "total",
+            "device_class": "water",
             "name": "{name} target",
             "state_topic": "wmbusmeters/{name}",
             "unique_id": "wmbusmeters_{id}_{attribute}",